To explore the dynamic trend and main influencing factors of the prevalence of subthreshold depression after stroke, so as to provide reference for the primary prevention and nursing intervention of post-stroke depression.

A total of 123 stroke patients admitted to the department of neurology of Daqing People's Hospital from September 2017 to June 2018 were selected by convenience sampling method. Major Depressive Disorder Scale (CES-D) , Hamilton Depression Scale (HAMD-17) , Behavioral Inhibition System and Behavioral Activation System Scale (BIS/BAS) and National Institutes of Health Stroke Scale (NIHSS) were applied in the investigation.

The prevalence of subthreshold depression after stroke at baseline, 3 months and 6 months was 25.6%, 18.6% and 20.4% respectively, and there was no statistical significant in the difference in prevalence at each time point (P>0.05) . The results of regression analysis showed that, at the time point of 2 weeks after stroke, gender, age and behavioral activation level were the main factors of subthreshold depression after stroke; after 3 months, age and behavioral activation level were the main factors of subthreshold depression after stroke; after 6 months, the number of complications and the level of behavioral activation were the main factors of subthreshold depression after stroke.

The prevalence rate of post-stroke subthreshold depression decreased first and then increased with time. The main factors of post-stroke subthreshold depression were different at each time point, and medical staff should treat differently according to different time points, so as to achieve the primary prevention of post-stroke depression.

Stroke; Subthreshold depression; Prevalence; Change trend; Influencing factors